User's Manual Part 1

System Overview of Subscriber Module MeshMAX 5054 Series User Guide

SU Registration

done only at startup; if another UNII device comes up on the same frequency, the BSU does not detect this or rescan

because of it. It is expected that other devices using these frequencies also are in compliance with country/band

regulations, so this should not happen.

3. Uniform Channel Spreading. To meet this requirement, the MP.11-R randomly selects operating channel from the

available channels with least interference. If the DFS Preferred Channel is configured, the unit begins by scanning

that channel. If no interference is detected, the unit makes this channel operational. If the channel is busy or occupied

by radar, the unit blacklists that channel and scans other available channels for the one with least interference. This

implements the Uniform Channel Spreading requirement by either automatically selecting the channel with least

interference or allowing the installer to manually select a channel with least interference from a channel plan.

Transmit Power Control

Transmit Power Control is a manual configuration selection to reduce the unit’s output power. The maximum output

power level for the operating frequency can be found in the event log of the unit’s embedded software.

ATPC (Automatic Transmit Power Control) is a feature to automatically adapt transmit power when the quality of the link

is more than sufficient to maintain a good communication with reduced transmit power. This feature is required for FCC

DFS. It works by monitoring the quality of the link and reducing the output power of the radio by up to 6 dB when good link

quality can still be achieved. When link quality reduces, the output power is automatically increased up to the original

power level to maintain a good link. For a full discussion of DFS, see Dynamic Frequency Selection (DFS) above.

By default, the unit lets you transmit at the maximum output power that the radio can sustain for data rate and frequency

selected. However, with Transmit Power Control (TPC), you can adjust the output power of the unit to a lower level in

order to reduce interference to neighboring devices or to use a higher gain antenna without violating the maximum

radiated output power allowed for your country/band. Also, some countries that require DFS also require the transmit

power to be set to a 6 dB lower value than the maximum allowed EIRP when link quality permits, as part of the DFS

requirements.

NOTE: When the system is set to transmit at the maximum power, professional installers must ensure that the maximum

EIRP limit is not exceeded. To achieve this, they may have to add attenuation between the device and the

antenna when a high gain antenna is used.

NOTE: You can see your unit’s current output power for the selected frequency in the event log. The event log shows the

selected power for all data rates, so you must look up the relevant data rate to determine the actual power level.

NOTE: This feature only lets you decrease your output power; you cannot increase your output power beyond the

maximum the radio allows for your frequency and data rate.

See System Parameters to configure Country. See Interface Parameters to configure Transmit Power Control.

SU Registration

The list of parameters you must configure for registration of the SU on a BSU are:

• Network Name

• Base Station System Name (when used; otherwise, leave blank)

•Network Secret

• Encryption (when used)

• Frequency Channel (when available)

See System Parameters to see the description of these fields and to configure them.

NOTES:

• The frequency channel must be the same for the BSU and the SU in order to register the SU when roaming is

not enabled and DFS is not required.